在WP前端，我为用户创建了一个上传表单。

该表单有三个输入字段（标题、标记和上载）。

所以我想补充一下“Title - Tag - file_name“作为alt 文件上载期间图像的属性。

我如何处理下面的代码？

if ($gui == \'upload\') {
    if (!function_exists(\'wp_generate_attachment_metadata\')){
        require_once(ABSPATH . "wp-admin" . \'/includes/image.php\');
        require_once(ABSPATH . "wp-admin" . \'/includes/file.php\');
        require_once(ABSPATH . "wp-admin" . \'/includes/media.php\');
    }
    if ($_FILES) {
       foreach ($_FILES as $file => $array) {
           if ($_FILES[$file][\'error\'] !== UPLOAD_ERR_OK) {
              return "Upload Err: " . $_FILES[$file][\'error\'];
           }
           $attach_id = media_handle_upload( $file, $newPost );
       }                        
   }
   if ($attach_id > 0){
       //and if you want to set that image as Post  then use:
       update_post_meta($newPost,\'Uploaded_Image_ID\',$attach_id);
   }
}